Stratagus is a free cross-platform real-time strategy game engine, capable of playing against human or computer opponents, network or local. It can be used to build RTS games similar to C&C, WC2, AOE, and Tzar and runs under Linux, BSD, MacOS and Win

This project aims at writing a threaded, object-oriented and scriptable game engine targetting the .NET platform, using a mixture of c# or managed c++ ports of famous c/c++ components such as OGRE, CEGUI, Newton, Lua, Python, Audiere, OpenAL, etc...

UnBGameDev is a student game development project at the University of Brasilia/Brazil. Our main goal is to learn by means of producing small games using free technologies, such as Ogre3D, Lua and Microsoft XNA.

Open-Source Massive Multiplayer Online Role-Playing Game engine. Server is semi-free, open for non-commercial use. Client is free software and the content is proprietary. Rehash from a 5-year-old project, active again since august 2007.

Wing is a modeling tool used for creating realistic natural landscape efficiently. More specifically, we try to proceduraly generate four key ingredients of nature ---- plants, terrain, water and weather, with simple but powerful user controls.

After gaining some experience in developing online games, this project is being remade in C# and XNA to ease the development process. Additionally, we now use a P2P architecture instead of Client-Server.

AOEmu is a high performance server emulator for the sci-fi MMORPG Anarchy-Online. This project aims to provide a fully functional server system for running and maintaining an Anarchy-Online server over one or many server machines running Linux.

Baroque is a game engine written with the .NET framework to demonstrate the power of managed code. It is primarily coded with C#, with wrappers for commonly used unmanaged libraries. It also has integration layers for Lua.NET and IronPython.

Guild Kit is a J2EE-based toolkit for building World of Warcraft (TM) (WoW) guild forums with additional functionality like skinning, armoury lookup support, extensive right model, DKP tracking and raid statistics.